Assessment of Leucaena leucocephala as bio-based adsorbent for the removal of Pb2+, Cd2+ and Ni2+ from water
Por:
Cima-Mukul, C. A., Olguin, M. T., Abatal, M., Vargas, J., Alberto Barron-Zambrano, Jesus, Avila-Ortega, Alejandro, Santiago, A. A.
Publicada:
1 ene 2020
Resumen:
This study was investigated the removal of Pb2+, Cd2+ and Ni2+ from
single and multicomponent aqueous solutions by Leucaena leucocephala.
The point of zero charge and the specific surface area of the bio-based
adsorbent were determined, and the Fourier-transform infrared
spectroscopy and scanning electron microscopy techniques were used to
characterize the biosorbent. The elemental composition before and after
the heavy metal adsorption by this material was found using energy
dispersive X-ray spectroscopy. The effects of various parameters such as
contact time (30-1,440 min), pH (2-10), initial adsorbate concentration
(10-500 mg L-1) and biosorbent dosage (1-10 mg L-1) were examined.
Biosorption capacity was found to be dependent on all of the parameters
studied. The amount of metal ions sorbed by L. leucocephala increased as
the radius of the cations decreased. Kinetic studies show that maximum
uptake of Pb2+, Cd2+ and Ni2+ was reached within 60 min of contact for
single and multicomponent solutions of these metallic ions. However,
metal removal by biosorbent using a single metal ion solution was higher
than that obtained using multicomponent solutions. Furthermore, the
biosorption process of the metal ions followed a well-defined
pseudo-secondorder model. The data's for the single and simultaneous
removal of Pb2+, Cd2+ and Ni2+ were analyzed according to Langmuir and
Freundlich isotherm models. The equilibrium data fit well in Freundlich
isotherm model. After the biosorption process, L. leucocephala was
treated with nitric acid at different concentrations to evaluate
reusability.
Filiaciones:
Cima-Mukul, C. A.:
Univ Autonoma Yucatan, Fac Ingn Quim, Kilometro 33-5, Merida 97203, Yucatan, Mexico
Olguin, M. T.:
Inst Nacl Invest Nucl, Dept Quim, Carretera Mexico Toluca La Marquesa S-N, Ocoyoacac 52750, Estado De Mexic, Mexico
Abatal, M.:
Univ Autonoma Carmen, Fac Ingn, Cd Del Carmen 24155, Campeche, Mexico
Vargas, J.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Unidad Morelia, Antigua Carretera Patzcuaro 8701, Morelia 58190, Michoacan, Mexico
Alberto Barron-Zambrano, Jesus:
Univ Autonoma Yucatan, Fac Ingn Quim, Kilometro 33-5, Merida 97203, Yucatan, Mexico
Avila-Ortega, Alejandro:
Univ Autonoma Yucatan, Fac Ingn Quim, Kilometro 33-5, Merida 97203, Yucatan, Mexico
Santiago, A. A.:
Univ Nacl Autonoma Mexico, Escuela Nacl Estudios Super, Unidad Morelia, Antigua Carretera Patzcuaro 8701, Morelia 58190, Michoacan, Mexico
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